/// <summary>
/// Default constructor, private to force singleton implementation.
/// </summary>
private HakInstaller()
{
objects = PropertyHandlerAttribute.GetHandlerCollection(this);
}
/// <summary>
/// Gets the handler collection for the specified object. This collection
/// contains all of the methods tagged with the [PropertyHandler] attribute.
/// </summary>
/// <param name="sourceObject">The source object for which to get the
/// collection</param>
/// <returns>The property handler collection</returns>
public static ObjectProperyHandlerDictionary GetHandlerCollection(object sourceObject)
{
ObjectProperyHandlerDictionary objects = new ObjectProperyHandlerDictionary();
// Get all of the methods of the type and look for ones that have the [DBQuery] attached.
Type sourceType = sourceObject.GetType();
MethodInfo[] methods = sourceType.GetMethods (
BindingFlags.Public | BindingFlags.NonPublic |
BindingFlags.Static | BindingFlags.Instance);
foreach (MethodInfo method in methods)
{
// Try to get the method's [PropertyHandler] attribute. If it
// doesn't have one then ignore it.
Attribute[] atts = method.GetCustomAttributes (
typeof (PropertyHandlerAttribute), false) as Attribute[];
if (null == atts || 0 == atts.Length) continue;
// Create a delegate for the method.
PropertyHandler handler = (PropertyHandler) (method.IsStatic ?
PropertyHandler.CreateDelegate (typeof (PropertyHandler), method) :
PropertyHandler.CreateDelegate(typeof (PropertyHandler), sourceObject, method.Name));
// Add the handler once for each property it handles. Handlers may
// handle more than one property thus the attribute array may have
// multiple entries.
foreach (Attribute att in atts)
{
PropertyHandlerAttribute handlerAtt = (PropertyHandlerAttribute) att;
// Look up the handler dictionary for the object, if there isn't one
// yet then create on.
PropertyHandlerDictionary handlers = objects[handlerAtt.Object];
if (null == handlers)
{
handlers = new PropertyHandlerDictionary(handlerAtt.Object);
objects.Add(handlerAtt.Object, handlers);
}
handlers.Add(handlerAtt.Property, handler);
}
}
return objects;
}